JPH0853824A - Dust remover - Google Patents

Abstract

PURPOSE:To prevent an occurrence of the abnormal differences in the water level in the front and rear of a dust remover, even if a large amount of dust temporarily flows in the dust remover and to prevent overload of the dust remover to protect an equipment from damage. CONSTITUTION:A plurality of dust-collecting frame bodies 4 are connected to an endless link chain, a dust bucket 21 for storing dust is provided to an upstream side of the lower part of each of the frame bodies 4, and in a dust remover for driving the link chain through a pair of up and down sprocket wheels, a net body 14 is provided to the overall surface of each of the frame bodies 4. A large number of bars 30 are monolithically provided to the frame bodies 4 in the vertical direction nearly at the same interval pitches over the overall surface on the upstream side of the net body 14. Each of the frame bodies 14 is inclined to the upstream side of a channel with the movement to the upper side from the lower side and is provided, the end 30a on the upstream side of each of the bars 30 is formed in the shape of a straight line, and the end 30a on the upstream side of each of the bars and net body 14 is inclined to the upstream side of the channel with the movement to the upper side from the lower side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover for removing dust from seawater or river water, and more particularly to a structure for keeping a water level difference before and after the dust remover small.

[0002]

2. Description of the Related Art Heretofore, as a generally used dust remover, it has been widely used in a waterway for industrial water or a waterway for collecting cooling water in a power plant, and the most well-known one is a waterway. A link chain is provided on both sides, and a bar screen or a wire netting is erected perpendicularly or almost perpendicularly to the flow direction for each link of the link chain, and the dust is caught by the net by rotating it. There is a structure that removes the water outside the waterway.

4 and 5 show an example of a conventional dust remover, FIG. 4 is an overall schematic view, and FIG. 5 is a detailed vertical sectional view (a) and front view (b) of a frame having a bucket portion. . In FIG. 4, 1 is an upper sprocket wheel, 2 is a lower sprocket wheel, 3 is a link chain mounted endlessly on both sprocket wheels 1 and 2, and 4 is a link chain 3.
A frame 5 having a bucket portion attached to the lower part for storing the captured dust, and a power device 5 for transmitting power to the upper sprocket wheel 1 via a transmission chain 6 and a chain wheel 7.
Is a shaft of the upper sprocket wheel 1, 9 is a guide plate for guiding dust to the trough 10, 11 is a housing of the dust removing device, 12 is a flowing water channel, and F arrow is a direction of flowing water.

As shown in FIG. 5, the frame body 4 is attached at every one pitch of the link chain 3, and 14 is a mesh body, which is composed of a wire mesh or a bar-like member arranged in a plow-like shape, and is provided with running water. It is a member that prevents the dust inside and scoops it up. Reference numeral 15 is an upper beam provided at the upper end of the net body 14, and the upper beam 15 is made of a pipe or a shaped steel such as a grooved steel having a suitable diameter according to the width of the water channel, and is attached to a side portion thereof. The net body 14 is integrally fixed via a plate 16. Reference numeral 19 denotes a side plate that holds the net body 14 from its side portion. The side plate 19 has a width wider than the link width of the link chain 3 as shown in FIG. The left and right end faces are integrally fixed. In other words, the side plate 19 and the upper beam 15 and the lower beam 17 form the frame body 4.

The frame 4 is fixed to the link chain 3 by fixing the side plate 19 to the side surface of the link 3a with the bolt 20. 21 is the lower beam 17
The dust bucket 21 is provided so as to obliquely cover the lower front part of the net body 14, and the left and right ends thereof are integrally fixed to the side plate 19 via the support plate 22. ing. Reference numeral 23 is a spray pipe provided on the back of the net body 14 that descends, and sprays spray water on the back surface of the net body 14 as indicated by the chain line, thereby
This is for removing the dust attached to No. 4.

Therefore, dust and the like floating in the flow are first blocked by the net 14, and are scooped up by the dust bucket 21 as the link chain 3 is raised, and the dust bucket 21 containing the dust is further raised. It becomes horizontal at the top of the upper sprocket 1, then reverses and descends. Then, the dust existing in the dust bucket 21 falls due to its gravity, is guided by the outer surface of the dust bucket 21 and the guide plate 9, and is discharged into the trough 10. On the other hand, dust and the like adhering to the net body 14 is separated by the spray water and discharged to the trough 10 via the outer surface of the dust bucket 21 and the guide plate 9 as described above. The endless link chain 3 to which the frame body 4 configured as described above is joined is normally driven by the upper sprocket wheel 1 having about 6 teeth as shown in FIG. The L arrow indicates the driving direction of the link chain.

[0007]

In recent years, as the amount of water intake has increased, the width of the canal has become wider, while the amount of dust floating in the canal tends to increase. If the inflow of water exceeds the capacity of the installed dust remover, the dust cannot be completely processed, and the water passage part of the frame body such as the net frame or bar frame is gradually blocked and eventually sufficient water flow is achieved. It became impossible to secure the water level, and the water level difference before and after the dust removing device suddenly increased. For this reason, if the water level difference before and after the dust removal device exceeds a certain value, the flowing water pressure applied to the frame such as the net frame and bar frame will be excessive, and the device will be structurally damaged. Measures such as limiting the amount of water taken were taken. However, if such a situation occurs during the power demand period, the power supply has not been able to keep up with the power demand, resulting in a power failure and a publicly significant abnormal situation.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and when a large amount of dust such as water mister temporarily flows in (hereinafter, referred to as "emergency"), the dust removing device is operated before and after the overload. In order to eliminate an abnormal water level difference, firstly, a plurality of frame bodies for collecting dust are joined to an endless link chain, and a dust bucket for storing dust is provided on the lower upstream side of each frame body, In the dust remover that drives the link chain through a pair of upper and lower sprocket wheels, a net is provided on the entire surface of each frame, and bars are provided at substantially equal pitches over the entire upstream surface of the net. A large number of them are provided integrally with the frame body in the vertical direction, the respective frame bodies are provided so as to be inclined toward the upstream side of the water channel from the lower side to the upper side, and the upstream end of each bar is a straight line. And the upstream end of each bar and the mesh are It provided to be inclined to the upstream side of the waterway toward the upper from the side.

Secondly, it is constructed such that a part of the bottom surface of the dust bucket is a water-permeable slit or mesh.

Thirdly, a dust inflow preventing seal plate is provided below the bottom surface of the dust bucket.

[0011]

According to the first configuration, relatively large lumps of dust in seawater are first blocked by the bar rows located on the upstream side, and the relatively fine dust that has passed through these bar rows is prevented. It is captured by the net in the latter stage. Therefore, the amount of dust that covers the mesh surface is relatively small even in the case of an emergency where the amount of dust is temporarily increased, and the difference in water level before and after the dust removing device is kept small. The upstream end of the bar is formed in a straight line, and the frame body, that is, the upstream end of the bar and the net are inclined toward the upstream side of the water channel from the bottom to the top. By being provided, the direction of the water flow passing through the frame is changed from the horizontal flow to the downward flow, and the relatively large dust and the net contacting the upstream end of the bar as described above are hit. The relatively fine dust that has come into contact with the frame body is smoothly and promptly moved downward by the upward rotation of the frame body and is smoothly stored in the dust bucket below the frame body.

[0012] The two steps of the bar and the net as described above are connected to each other to capture the dust, and to smoothly and promptly transfer the captured dust downwardly and to store it in the dust bucket. In addition, since it is carried out in succession one after another by a plurality of raised and rotating frames, water can be effectively passed through each frame even in an emergency, and an abnormal water level difference before and after the dust removing device can be ensured. Effectively kept small.

Further, by adopting the second structure, it is possible to increase the water passage area and at the same time reduce the pumping power for scooping in the bucket portion during operation.

By adopting the third structure, the dust that passes through between the vertically adjacent frames is guided to the lower frame, and the water flow direction is made downward. Is done.

[0015]

EXAMPLES Examples of the present invention will be described in detail below. FIG. 1 is a partially enlarged front view of a frame body according to an embodiment of a dust remover of the present invention, and FIG. 2 is a reduced view taken along the line II of FIG. 1 showing a state in which a plurality of frame bodies are vertically connected. Cross-sectional side view, FIG.
FIG. 6 is a sectional side view of a frame body showing another embodiment corresponding to FIG. 2.

In FIG. 1, a frame body 4 is formed by connecting an upper beam 15 made of a pipe and a dust bucket 21 which also serves as the lower beam 17 of FIG. A large number of bars 30 having an inner size of the frame body 4 are erected vertically from the dust bucket 21 and arranged in the lateral width direction of the frame body 4 at substantially equal pitches to be integrally attached to the frame body 4. . The upstream end 30 of each bar 30
a is linearly formed. Further, on the downstream side of the row of bars 30, the net body 14 is fastened to the upper beam 15 and the side surface of the dust bucket 21 over the entire surface of the frame body 4 by means of bolts and nuts and the like via the mounting plates 16 and 18. To install. As described above, the dust bucket 21 is positioned and provided on the upstream side of the lower portion of the frame body 4.
A slit 32 is provided on the bottom surface of the.

The frame 4 is joined by fastening the side plates 19 and the link chains 3a with the bolts 20 at the left and right ends of the frame 4 in a state where the frame 4 is inclined toward the upstream side of the water channel from the lower side to the upper side. To be done. That is, a plurality of frame bodies 4 are connected to and attached to the endless link chain 3a in a state of being inclined toward the upstream side of the water channel from the lower side to the upper side. The upstream end 30a of each bar 30 and the net body 14 are also provided so as to be inclined toward the upstream side of the water channel from the bottom to the top. In addition, bar 3
Considering the size of dust in the running water, the pitch interval of 0 is 2
It is appropriately selected within the range of 0 to 100 mm. The size of the mesh of the mesh 14 is selected within the range of 1/10 to 1/2 of the bar pitch. As another embodiment, as shown in FIG. 3, a dust inflow preventing seal plate 36 is further arranged at the lower bottom portion of the dust bucket 21.

The operation of the dust removing device having the frame 4 composed of the bar 30 and the net body (screen or wire net) 14 configured as described above will be described. Of the dust particles flowing from the upstream side of the water channel (to the left in the figure) that are flowing in or on the surface of the flowing water, relatively large dust particles, such as water mica and wood chips, first come into contact with the row of bars 30 in the front, and the frame of the dust remover It moves downward as the body 4 moves up and is stored in the dust bucket 21. On the other hand, a relatively small dust is a bar 30 and a bar 30
It comes out and comes into contact with the net body 14 on the downstream side. Then, after being similarly moved downward, it is stored in a space (referred to as a bucket portion) formed by the dust bucket 21, the net body 14 and the inner surface of the bar 30. In this way, the collected dust is passed through the upper sprocket 1 and turned over, and then is sprayed by the spray 23 as shown in FIG. And discharge to the trough 10.

However, in this embodiment, first, large dust particles are blocked from passing by the row of bars 30 provided in the upstream in the vertical direction, and the small dust particles passing through these bar rows 30 are discharged to the downstream side. Since it is captured by the net body 14, the amount of dust covering the surface of the net body 14 is reduced even in an emergency, and the difference in water level before and after the dust removing device is kept small. In addition, the frame 4 is not in the vertical direction, that is, the upstream end 30a of the bar 30 and the plane of the net 40 are not in the vertical direction, and are inclined toward the upstream side of the water channel from the bottom to the top. Therefore, the dust that abuts on the bar 30 or the net body 14 as described above is urged by the gravity action and the downward flow of water along this inclination, and is vertical or reversely inclined. It is transferred to the bucket part more quickly than in. In addition, since the upstream end 30a of the bar 30 is formed in a straight line, the dust that abuts on the bar 30 is smoothly transferred to the lower side of the frame 4 along the end 30a, and the dust flows under the water flow. Combined with the urging action due to the counterflow, the storage in the bucket portion is performed very smoothly.

The two steps of the bar 30 and the net body 14 connect the dust trapping action, the smoothly and promptly transferring the trapped dust downwardly, and the storing action in the dust bucket 21. Since a plurality of ascending and rotating frame bodies 4 provided in this manner sequentially and successively perform water passage through each frame body 14 even in an emergency, it is possible to secure the water flow through the frame body 14 before and after the dust removing device. An abnormal water level difference can be effectively suppressed.

Further, the bottom of the dust bucket 21 is provided with a slit 32 in the embodiment of FIG. 2, and the other embodiment of FIG. 3 is provided with an opening having a width close to almost the entire bottom surface of the dust bucket 21. By installing the mesh body 34 that covers this, the water flow toward the bucket portion is promptly passed without swirling in the bucket portion, and a smooth downward flow without swirling in the bucket portion. Therefore, not only can the water passage area be expanded, but the power for lifting unnecessary fluid upward during operation can be reduced.

Further, in the other embodiment of FIG. 3, in order to prevent seawater that is not removed from dust from passing between the frame bodies 4 which are vertically connected, the inclination angle of the frame body 4 is substantially the same as that of the bottom surface of the dust bucket 21. It is preferable that the dust inflow prevention seal plate 36 is provided on the slope of the above position so that the dust removal capability can be improved and the downward flow of the running water can be supported. A perforated plate such as punching metal may be used in place of the slit 32 on the bottom surface of the dust bucket 21, and an expanded metal or the like may be used in the net body 34 instead of an ordinary wire net.

Therefore, in an emergency such as the occurrence of an abnormality of the water mister, the amount of dust in the running water is much higher than that of the dust removing device in the normal dust removing device, and the net body 14 of the frame body 4 is continuously rotating in a continuous manner. As a result, the passage of the flowing water itself to the dust removing device is greatly hindered. As a result, the water level difference before and after the dust remover greatly exceeds the normal water level difference, and the upstream water level is abnormally high, while the downstream water level decreases abnormally. Therefore, in the present invention,
After removing large dust particles by the row of bars 30, fine dust particles can be collected, so-called two-stage collection can be performed, and the collected dust particles are urged by the downward water flow. It can be smoothly slid and transferred below the frame 4 along the upstream end 30a of the bar 30 and the surface of the net 14, and can be quickly stored in the dust bucket 21 below.
Further, by adopting the configurations described in claims 2 and below, it is possible to sufficiently deal with these emergency situations.

[0024]

According to the first aspect of the present invention, a relatively large lump of dust in seawater is first blocked by the row of bars located on the upstream side, and is relatively fine after passing through these rows of bars. The dust is captured by the net body in the subsequent stage. Therefore,
Even in a so-called emergency when the amount of dust becomes temporarily large, the amount of dust covering the mesh surface can be relatively small, and the difference in water level before and after the dust removing device can be kept small. The upstream end of the bar is formed linearly, and the frame body, that is, the upstream linear end of the bar and the net are inclined with their lower portions directed toward the downstream side. As a result, the water flow is supported in the downward flow, and the dust accumulated in the bar or the net can be transferred to the bucket portion below the frame more smoothly and more quickly.

The two steps of the bar and the net are connected to each other to capture dust, and to smoothly and swiftly move the trapped dust downward and to store the dust in the dust bucket. In addition, since it is carried out in succession one after another by a plurality of raised and rotating frames, water can be effectively passed through each frame even in an emergency, and an abnormal water level difference before and after the dust removing device can be ensured. It is possible to effectively keep it small.

Therefore, the load applied to each component part of the dust removing device can be reduced and the device can be prevented from being damaged, so that the safety is improved. Further, since the minimum required water intake can be secured even in an emergency, continuous stable operation is possible, reliability in using the device is enhanced, and maintenance and operation operability of the device are improved.

By adopting the structure of claim 2, in addition to the above effect, it is possible to further increase the water passage area to improve the dust removal effect, and at the same time reduce the pumping power for scooping at the bucket portion during operation.

By adopting the structure of claim 3, in addition to the above-mentioned effect, since the dust that passes through between the frame bodies is guided to the lower frame body, the dust removing effect can be improved and the dust removing device can be provided. Since the downward flow of the water flow in the vicinity is further promoted, it is possible to reduce the running cost and lengthen the life of the equipment by reducing the water level difference before and after the dust removing device in an emergency and reducing the pumping power of the bucket.

[Brief description of drawings]

FIG. 1 is a partially enlarged front view of a frame body according to an embodiment of a dust remover of the present invention.

FIG. 2 is a cross-sectional side view of the frame body showing a state in which a plurality of frame bodies are vertically connected in a reduced view taken along the line II of FIG.

FIG. 3 is a sectional side view of a frame body according to another embodiment of the present invention, which is shown in correspondence with FIG.

FIG. 4 is an overall schematic diagram showing an example of a conventional dust remover.

5A is a detailed vertical sectional view of a frame body having a bucket portion of a conventional dust removing device, and FIG. 5B is a front view thereof.

[Explanation of symbols]

 1 Upper sprocket wheel 2 Lower sprocket wheel 3 Link chain 3a Link 3b Roller 4 Frame 5 Power unit 6 Transmission chain 7 Chain car 14 Net body 15 Upper beam 21 Dust bucket (lower beam) 30 Bar 30a Bar upstream end (End edge) 32 Slit 34 Net body 36 Dust inflow prevention seal plate F Flow direction of running water L Link chain driving direction

Claims (3)

[Claims] 1. A plurality of frame bodies for collecting dust are joined to an endless link chain, a dust bucket for storing dust is provided on the lower upstream side of each frame body, and the link chain is provided with a pair of upper and lower sprockets. In a dust remover driven via a foil, a net is provided on the entire surface of each frame, and a large number of bars are arranged at substantially equal pitches over the entire upstream surface of the net.
It is provided integrally with the frame body in the vertical direction, and each frame body is provided so as to be inclined toward the upstream side of the water channel from the lower side to the upper side, and the upstream end of each bar is linear. The dust removing device is characterized in that the upstream end and the net body of each of the bars are provided so as to be inclined toward the upstream side of the water channel from the lower side to the upper side. 2. The dust removing device according to claim 1, wherein a slit or a net which allows water to pass through a part of a bottom surface of the dust bucket. 3. The dust remover according to claim 1, wherein a dust inflow prevention seal plate is provided at a lower portion of a bottom surface of the dust bucket so as to project therefrom.